Angle-iron-bending machine.



F. V. BURMAN.

ANGLE IRON BENDING MACHINE.

APPLICATION FILED FEB. 9. 1914.

Patented June 29, 1915.

4 SHEETS-SHEET I.

WlTNESSES: INVENTOR F. V. BURIVIAN.'

ANGLE IRON BENDING MACHINE.

. APPLICATION FILED fEB. 9, I914. LMQAfiQ I Patented June-29, 1915.

v 4 SI'IEETS SHEET 2.

IIIIII IIIIII WITNESSES: 8 ,K, INVENTEL W ATTORNEY F. V. BURMAN.

ANGLE IRON BENDING MACHINE.

, APPLICATION FILED FEB. 9. i914.

1,14%,459. Patented June 29, 1915.

4 SHEETSSHEET 3.

F. V. BURMAN.

ANGLE IRON BENDING MACHINE.

APPLICATION FILED FEB. 9. 1914.

l P 1 4%459 Patented June 1915.

4 SHEETS- 4.

' T at? whom it may concern:

- ing at Bay City, in the county of Bay and FRANK V. BURMAN, 0F BAYarana ora ion.

GETTY, MICHIGAN, ASSIGNOR TO BAY CITY IRON 80., OF

BAY CITY, MICHIGAN.

1 ANGLE-IRON-BENDIING MACHINE.

Specification of Letters Patent. Pat te e 2 9 15 Appficationniearet'mary a, 1914,. Serial No. 817,545.

Be it known; that I, FRANK B unMAN, a subject of the Emperor of Russia,resid- Stalte'of Michigan, have invented certain new and usefulImprovements in Angle- Iron-Bending Machines; and I .do herebydeclare'the following to be a full, clear, and.

enact-description-of the inventi'om such as will enable others skilledthe art to which it appertains to make and use the-same. This inventionrelates to angle-iron bending machines. I

The object of my invention is to provide a machine so constructed thatangle-irons, T-irons and the like may be bent to any desired curvature,with the flange or rib either in or out; and further to bend theangle-iron in such a manner that the planes of the flanges will beperpendicular to each other at all times during the bending operation;'andstill further to bend the angleirons without warping the flanges bylateral distortion; the bending pressure being 'exerted uniformly on oneonly of the angleiron flanges.

A- further object of the invention is to provide a means wherebyone-half of the two-part bending rolls may be easily and readilyadjusted longitudinally to receive between them flanges of angle-ironsof various sizes or dimensions.

A still further object is to providean -ad- 'ju'sting meansforvertically adjusting one of. thebending-rolls to bend the angle-ironto the curve of the desired radius.

' With the above and other objects in view, which will appear in'thefollowing specification, the invention consists incertain new and novelfeatures 'of construction, arrange mentsand combination of 'partsandtheir equivalents, as will be more fully described hereinafter andfinally pointed out in the claims hereto appended.

Y Referring to the accompanying drawings "forming a part of thisspecification wherein like referencesrdenote similar partsthroughout-the several views: Figure 1 is a front elevation of myimproved angleiron bending machine, showing in dotted lines anangle-iron being loe'nt. Fig. 2 is a side elevation thereof. Fig. 3 is acrosssectional view taken on line 3-3 of Fig. 2.

2 is aseetionirldetail on line H "of disposed shaft 35.

for raising or lowering the roll A by means .fra ne members 5. The threerolls between which the angle-irons are engaged are arranged in closetriangular relation, two of the rolls B and C, being thelower ones, aremounted on non-adjustable shafts journalied in the frame-members 5 andthe third or upper roll A is arranged midway between the lower rolls, asclearly shown in Fig. 1 of the drawing. Shafts 2 and 3 are driven bymeans of the gear 6 mounted on shaft 7 and meshingwith gears Sand 9respectively and best illustrated in Fig. l. Shaft? is in turn driven bymeans of a train of gears 10, 11 12, 13, 14 and 15 mounted on shafts 716, 1i and 1.8 respectively. Shaft 18 is the power-driven shaft and isdriven by anysuitable means, such as belts running over loose pulleys 19and 20 controlled by a suitable clutch 21, which is actuated by means ofthe lever 22 through the connections 23 and 24:.

To permitthe vertically adjustable roll A to be driven, I provide shaft7 with a gear 25 and shaft 1 with a gear 26, which are adapted to meshwith an idler-gear 27 mounted on an auxiliary shaft 28 journaled in oneend of the two pairs of toggle links 29 and 30. This link connectionpermits the idler-gear 27 to be retained in mesh with "gears 25 and 26as shaft 1 is raised or lowered. This arrangement also permits roll A tobe adjusted. while themachine is either in motion or stationary.

The means for vertically adjusting r0ll A comprises a screw 31 securedto each journal-bearing and entering a threaded bushing 32 mounted onframe'members 5. The upper end of each bushing is provided with a.'bevel gea-r 33 meshing with the bevel-gears 34 mounted on thehorizontally- This shaft is rotated of a suitable hand-wheel 36 orsimilar device. This arrangement permits each end of shaft -1 to beraised simultaneously.

37 bending-roll fixed to the shaft 1- ,and 37 designates a pair ofbending rolls 'fixedto shafts 2 and 3 respectively. Each er the aboverolls is preferably provided in, as indicated by dotted. lines in Fig.5, and

against and rotate the rolls 49 as the angle:

to cause the periplieriyffof roll A to engage the upper face of one ofthe angle-iron flanges when-the flange is being'bent outwardly.

The adjustable bending rolls designated A, B and O each comprise acylindrical body having a neck 39, the periphery of each roll beingpreferably provided'with ahard-steel face 40. The adjustable rolls A, Band O are each slidably secured upon the shafts 1, 2 and 3 by means of afeather 41. Similar feathers 41 are secured to each of the shafts 1,.2and 3 and are received in the slots or ways 42 of the rolls A, B and C.The end of each shaft 1, 2 and 3 is provided with a threaded stud 43adapted to take a nut 44 carrying the spaced peripheral flanges 45 and46. These flanges are adapted to engage'either side of anapertured plate47 sunk into the end face of the neck of each roll A, B andv A lock nut48 is also threaded on the stud. The lock-nut having been loosened, thenut 44 may be turned in either direction to move the rolls A, B and Clongitudinally upon the shafts 1, 2 and 3, thereby widening or narrowingthe flange space between the rolls 37, 37, 37. and the rolls A, B and 0,according to the direction in which the nuts 44 are turned.

The means for preventing lateral distor tion or warping of theangle-irons as they are being bent to the desired curvature comprises aroll 49 rotatably mounted between a pair of arms 50. These arms 50 areslidably mounted in a suitable bearing 51 forming a part of the frontframe-member 5. The roll is adjustable longitudinally by means of thescrew 52. This screw, as shown in Fig. 2, is connected at one end bymeans of a cross-head to the arms 50. The oppo site end is threadedthrough an adjusting nut 49 received in a cut-away portion of thebearings 51. One of these angle-iron warping or lateraldistortion-preventing rollers is arranged on each side of the machine,as clearly shown in Fig. 1. v

The rolls 49 are eachpreferably arranged at .an incline so that the axisof the roll lies at substantially right angles'to the angleiron beingbent. face of one of the angle-iron flangesto bear This permits theouter;

iron is propelled to-and-fro by means of the bending rolls 'A,-; B, O,37 and 37. The operation of my invention is as follows First, theflange-space between the bending.-

rolls is adjusted to-receive one of the flanges of the ang'le-iron to bebent. The warping or lateral distortion-rolls are next adjusted toengage one of the'angle-iron flanges. The rolls are then rotatedin onedirection until the angle-iron. has all but left one of the sets oflower bending rolls; then the machine is preferably stopped; the upperbending-roll is then lowered to increase the curvature of the angle-ironduring the back ward travel of the bending rolls. This to- ,and-frooperation and the progressive lowering of the upper bending roll isrepeated until the desired curvature of the angle-iron or T-iron issecured.

Having thus described my invention, what I claim and desire to secure byLetters Patent is: "2

1. In an angle-iron bending machine, the

combination with a frame" and a train of driving shaft, a pair ofnon-adjustable bending-roll shafts arranged in a horizontal plane belowsaid driven-shaft and parallel therewith, a

gears, of a non-adjustable driven vertically adjustable bending-rollshaft, ar-. ranged above said non-adjustable drivenshaft, a pairoftoggle links connecting said vertically adjustable shaft and saiddriven-1 shaft, gears on said shaft, an'idler gear revolubly mounted atthe intersection of said toggle links and engaging the gears of saidshaft respectively, a set of two-part bending rolls mounted on each ofthe aforesaid bending-roll shafts, one part of each bendingroll beinghorizontally adjustable with relation to the other part, which part isfixed, whereby to increase or decrease the flangespace between each setof bending-rolls.

- 2. In an angle-iron bending machine, the combination with a pluralityof shafts, a set of bending-rolls mounted on each shaft, each setcomprising a roll fixed to each of said shafts, and a roll arranged oneach'shaft ad j acent said fixed roll, said latter rolls beinglongitudinally adjustableupon their shafts to increase or decrease theflange space between the two rolls of each set, and means operativelyconnecting said adjustable rolls and their shafts, said means adapted toforce the rolls either toward or away from the.

corresponding fixed rolls .toeffect their relative adjustment. 1

In testimony whereof, I aflix my signature in presence of two witnesses.

FRANK v. BURMVAN.

Witnesses 1 FREDK'J. LARSON, WM. J. WAL r.

